1994年10—12月的全球地震动态

１９９４年第四季度，全球地震在维持了一年多的中等水平以后，出现了高水平的活动。全球地震如１９９３年，继续以西北太平洋地震带为中心，千岛群岛和日本本州以东接连发生海沟浅源大地震。１９９３－１９９４两年，全球最大地震发生在西北太平洋地区。菲律宾海周边地区发生强烈地震多次，日本南部近海海槽区发生大地震的形势更加迫近。中国大陆东半部地震活动有增强的迹象，１９９５年，中国华北地震活动将有新发展。本季度美洲地

DEVELOPMENTS IN GLOBAL SEISMICITY FOR OCTOBER-DECEMBER 1994

During the 4th quarter of the year 1994, the global seismicity appeared at high level after remaining at medium level for more than one year. As in 1993, the global seismicity center is still in the seismic belt of the northwest Pacific Ocean, and trench shallow earthquakes successively occurred in the Kuril Islands and the sea area off eastern Honshu, Japan. The largest earthquake of the globe occurred in the northwest region of the Pacific Ocean during the two years, 1993 and 1994. Some strong earthquakes occurred in surrounding regions of the Philippine sea. The situation that a large earthquake will occur in the sea trough region off southern Japan is drawing nearer. There are increasing indications of seismicity in the eastern part of the Chinese mainland,and in 1995 there will be new develobments of seismicity in North China. During this quarter the seismicity on the American seismic belt and the Eurasian seismic belt became calm, and no earthquakes with M 7. 0 occurred in the Oceanic Island-Arcs.